An air content measuring instrument for concrete mix design

Abstract

This utility model discloses an air content measuring instrument for concrete mix design, including a loading assembly. The loading assembly includes a measuring bowl, inside which a mixing assembly is installed. A measuring assembly and a sealing assembly are installed on the top of the measuring bowl. The measuring assembly includes a bowl cover that is fixedly and movably installed on the top of the measuring bowl. Through the setting of the sealing assembly, this utility model utilizes the connection relationship between the support frame, fixing ring, screw, moving block, four sets of rotating seats, four sets of connecting rods, four sets of clamping blocks, and four sets of clamping grooves. Rotating the screw clockwise or counterclockwise indirectly drives the four sets of clamping blocks to move closer or further apart. When they move closer, the V-shaped clamping grooves on the inner side of the four sets of clamping blocks clamp and fix the measuring bowl and bowl cover. When they move further apart, the V-shaped clamping grooves on the inner side of the four sets of clamping blocks release the clamping and fixing of the measuring bowl and bowl cover. This achieves the effect of controlling the opening and closing of the bowl cover by rotating the screw alone, thereby improving the efficiency of the air content measuring instrument.

Description

Technical Field

[0001] This utility model relates to the field of concrete technology, specifically to an air content measuring instrument for concrete mix design. Background Technology

[0002] An air content meter for concrete is used to measure the air content in a mixture. Concrete can be divided into two components: coarse aggregate and mortar. The size of the coarse aggregate has almost no direct effect on the air content. The introduced air bubbles are distributed in the fine particles of the concrete, i.e., the mortar, and the properties of the mortar, in turn, determine the overall properties of the concrete.

[0003] Existing gas content analyzers generally use a measuring bowl method for measurement. However, the opening and closing of existing measuring bowls and bowl lids mostly rely on multiple sets of screw clamps for fixing and sealing, which makes opening and closing the measuring bowl and bowl lid time-consuming and laborious, seriously reducing the efficiency of the gas content analyzer. Utility Model Content

[0004] The purpose of this invention is to provide an air content measuring instrument for concrete mix design. Through the sealing assembly, and utilizing the threaded connection between the screw and the moving plate, rotating the screw clockwise or counterclockwise moves the moving plate up and down. This movement causes four sets of connecting rods to rotate on the fixed ring. Simultaneously, the rotation of the four sets of connecting rods causes the clamping blocks to move closer or further apart. When they move closer, the V-shaped grooves on the inner sides of the four sets of clamping blocks clamp and fix the measuring vessel and its lid. When they move further apart, the V-shaped grooves on the inner sides of the four sets of clamping blocks release the clamping and fixing of the measuring vessel and its lid. This achieves the effect of controlling the opening and closing of the lid solely by rotating the screw, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an air content measuring instrument for concrete mix design, comprising a loading assembly, the loading assembly including a measuring bowl, a mixing assembly installed inside the measuring bowl, a measuring assembly and a sealing assembly installed on the top of the measuring bowl, the measuring assembly including a bowl cover fixedly and movably installed on the top of the measuring bowl, the sealing assembly including a support frame fixedly installed on the top of the bowl cover, a fixing ring fixedly installed on the inner side wall of the support frame, a screw rod through-mounted on the top of the support frame, a movable plate threadedly connected to the outer arc surface of the screw rod, four sets of rotating seats fixedly installed on the outer arc surface of the movable plate, a set of connecting rods rotatably installed on the inner side of each of the four sets of rotating seats, the middle of each of the four sets of connecting rods rotatably connected to the outer arc surface of the fixing ring, and a set of clamping blocks fixedly installed at one end of each of the four sets of connecting rods, and a set of V-shaped clamping grooves opened on the inner side of each of the four sets of clamping blocks.

[0006] Preferably, a limiting rod is fixedly installed on the inner bottom of the support frame, one end of the limiting rod extends through to the bottom of the movable plate, and a limiting plate is fixedly installed on one end of the limiting rod.

[0007] Preferably, an air chamber is fixedly installed on the top of the bowl cover, a water injection valve is connected to the side arc surface of the bowl cover, and an exhaust valve is connected through the middle of the bowl cover, with one end of the exhaust valve extending to the outside of the air chamber.

[0008] Preferably, the top of the air chamber is connected to an air pump, a fine-tuning valve, and a pressure gauge, and a valve stem is movably installed through the top of the air chamber.

[0009] Preferably, the outer arc surface of the valve stem is movably and sealingly connected to the top of the air chamber, and the bottom end of the valve stem extends through the interior of the bowl cover.

[0010] Preferably, a number of support rods are fixedly installed at the bottom of the measuring bowl, and a base is installed at the bottom of the number of support rods.

[0011] Preferably, the stirring assembly includes a drive motor fixedly bolted to the top of the base, the output shaft of the drive motor is keyed to a rotating rod, one end of the rotating rod passes through the interior of the measuring bowl via a sealed bearing, and several sets of stirring rods are fixedly installed on the outer arc surface of the rotating rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention utilizes a sealing assembly and the connection between a support frame, a fixing ring, a screw, a moving block, four sets of rotating seats, four sets of connecting rods, four sets of clamping blocks, and four sets of clamping grooves. Rotating the screw clockwise or counterclockwise indirectly moves the four sets of clamping blocks closer or further apart. When they are close together, the V-shaped clamping grooves on the inner sides of the four sets of clamping blocks hold and fix the measuring bowl and its lid. When they are far apart, the V-shaped clamping grooves on the inner sides of the four sets of clamping blocks release the clamping and fixing of the measuring bowl and its lid. This achieves the effect of controlling the opening and closing of the lid solely by rotating the screw, thus improving the efficiency of the gas content analyzer.

[0014] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the installation structure of the stirring assembly of this utility model;

[0017] Figure 3 This is an exploded view of the measuring component of this utility model;

[0018] Figure 4 This is an exploded view of the sealing assembly of this utility model;

[0019] Figure 5 This is a schematic diagram of the installation structure of the limiting plate of this utility model.

[0020] In the diagram: 1. Loading assembly; 11. Measuring bowl; 12. Support rod; 13. Base; 2. Stirring assembly; 21. Drive motor; 22. Rotating rod; 23. Stirring rod; 3. Measuring assembly; 31. Bowl cover; 32. Air chamber; 33. Water injection valve; 34. Exhaust valve; 35. Air pump; 36. Fine-tuning valve; 37. Valve stem; 38. Pressure gauge; 4. Sealing assembly; 41. Support frame; 42. Fixing ring; 43. Screw; 44. Moving plate; 45. Limiting rod; 46. Limiting plate; 47. Rotating seat; 48. Connecting rod; 49. Clamping block; 50. V-groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This utility model provides an air content measuring instrument for concrete mix design, including a loading component 1, which includes a measuring bowl 11. A mixing component 2 is installed inside the measuring bowl 11. A measuring component 3 and a sealing component 4 are installed on the top of the measuring bowl 11. The measuring component 3 includes a bowl cover 31 fixedly and movably installed on the top of the measuring bowl 11. The sealing component 4 includes a support frame 41 fixedly installed on the top of the bowl cover 31. A fixing ring 42 is fixedly installed on the inner side wall of the support frame 41. A screw 43 is threaded through the top of the support frame 41. A moving plate 44 is threadedly connected to the outer arc surface of the screw 43. Four sets of rotating seats 47 are fixedly installed on the outer arc surface of the moving plate 44. A set of connecting rods 48 is rotatably installed on the inner side of each of the four sets of rotating seats 47. The middle of each of the four sets of connecting rods 48 is rotatably connected to the outer arc surface of the fixing ring 42. A set of clamping blocks 49 is fixedly installed at one end of each of the four sets of connecting rods 48. A set of V-shaped clamping grooves 50 is opened on the inner side of each of the four sets of clamping blocks 49.

[0023] In use, by using the loading component 1 and sealing component 4, and utilizing the threaded connection between the screw 43 and the moving plate 44, rotating the screw 43 clockwise or counterclockwise causes the moving plate 44 to move up and down. The up and down movement of the moving plate 44 causes the four sets of connecting rods 48 to rotate on the fixed ring 42. As the four sets of connecting rods 48 rotate, they cause the clamping blocks 49 to move closer or further apart. When they move closer, the V-shaped clamping grooves 50 on the inner side of the four sets of clamping blocks 49 clamp and fix the measuring bowl 11 and the bowl cover 31. When they move further apart, the clamping and fixing of the measuring bowl 11 and the bowl cover 31 by the V-shaped clamping grooves 50 on the inner side of the four sets of clamping blocks 49 is released. This achieves the effect of controlling the opening and closing of the bowl cover 31 by rotating the screw 43 alone. Combined with the mixing component 2 and the measuring component 3, this achieves the effect of measuring the air content of concrete.

[0024] A limiting rod 45 is fixedly installed on the inner bottom of the support frame 41. One end of the limiting rod 45 extends through to the bottom of the movable plate 44, and a limiting plate 46 is fixedly installed on one end of the limiting rod 45. Utilizing the connection relationship between the support frame 41, the movable rod, the limiting rod 45, and the limiting plate 46, the movable plate 44 always slides on the outer arc surface of the limiting plate 46, ensuring that the movable plate 44 only moves up and down and does not rotate with the screw 43. At the same time, the limiting plate 46 limits the downward movement of the movable plate 44, preventing the movable plate 44 from slipping off the bottom of the limiting rod 45.

[0025] An air chamber 32 is fixedly installed on the top of the bowl cover 31. A water injection valve 33 is connected to the side arc surface of the bowl cover 31. An exhaust valve 34 is connected through the middle of the bowl cover 31. One end of the exhaust valve 34 extends to the outside of the air chamber 32. Water is injected into the upper part of the measuring bowl 11 through the water injection valve 33, and the air between the measuring bowl 11 and the bowl cover 31 is discharged through the exhaust valve 34, thereby improving the accuracy of the gas content measurement.

[0026] The top of the air chamber 32 is connected to an air pump 35, a fine-tuning valve 36, and a pressure gauge 38. A valve stem 37 is movably installed through the top of the air chamber 32. The air pump 35 is operated to inflate the air chamber 32. The air pressure inside the air chamber 32 is controlled by the fine-tuning valve 36. Then, the valve stem 37 is pressed to connect the air chamber 32 to the inside of the measuring bowl 11. The change in air pressure in the air chamber 32 is observed to achieve the effect of measuring the air content of concrete.

[0027] The outer arc surface of the valve stem 37 is movably and sealingly connected to the top of the air chamber 32, and the bottom end of the valve stem 37 extends into the interior of the bowl cover 31. Through the connection between the valve stem 37, the air chamber 32, and the bowl cover 31, the effect of pressing the valve stem 37 to connect the air chamber 32 with the interior of the measuring bowl 11 is achieved.

[0028] Several sets of support rods 12 are fixedly installed at the bottom of the measuring bowl 11. A set of base 13 is installed at the bottom of the several support rods 12. Through the connection between the measuring bowl 11, the support rods 12 and the base 13, the stability of the gas content analyzer during use is increased, and the measurement error caused by the tilting and shaking of the gas content analyzer is avoided.

[0029] The mixing assembly 2 includes a drive motor 21 fixedly bolted to the top of the base 13. The output shaft of the drive motor 21 is keyed to a rotating rod 22. One end of the rotating rod 22 passes through the interior of the measuring bowl 11 via a sealed bearing. Several sets of stirring rods 23 are fixedly installed on the outer arc surface of the rotating rod 22. By utilizing the connection relationship between the drive motor 21, the rotating rod 22, the stirring rods 23, and the measuring bowl 11, the drive motor 21 is started to drive the rotating rod 22 to rotate, while the stirring rods 23 rotate inside the measuring bowl 11. This achieves the effect of mixing the concrete inside the measuring bowl 11, increasing the density of the concrete, and preventing air in the voids of the concrete from affecting the measurement results.

[0030] In practical use: Rotate the screw 43 counterclockwise to move the four sets of clamps 49 away from each other, thereby releasing the seal between the lid 31 and the measuring bowl 11. Remove the lid 31, add the concrete to be measured into the measuring bowl 11, start the drive motor 21 to drive the stirring rod 23 to stir the concrete inside, thereby expelling any residual gas from the loose concrete. Add concrete until it is level with the top of the measuring bowl 11, then replace the lid 31 on top of the measuring bowl 11, and rotate the screw 43 clockwise to move the four sets of clamps 49 away from each other. The clamping blocks 49 are brought closer together to restore the sealed and fixed state between the bowl cover 31 and the measuring bowl 11. The water injection valve 33 and the air release valve 34 are opened. When the water flows out through the air release valve 34, all the air in the gap inside the measuring bowl 11 has been expelled. The air pump 35 is operated to inflate the air chamber 32. The air pressure inside the air chamber 32 is controlled to maintain a specific value by the fine adjustment valve 36. Then, the valve rod 37 is pressed repeatedly to connect the air chamber 32 with the inside of the measuring bowl 11. The change in air pressure in the air chamber 32 is observed to achieve the effect of measuring the air content of concrete.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air content meter for use in the design of concrete mixtures, characterized by: It includes a loading assembly (1), which includes a measuring bowl (11), a stirring assembly (2) installed inside the measuring bowl (11), a measuring assembly (3) and a sealing assembly (4) installed on the top of the measuring bowl (11), and the measuring assembly (3) includes a bowl cover (31) that is fixedly and movably installed on the top of the measuring bowl (11). The sealing assembly (4) includes a support frame (41) fixedly installed on the top of the bowl cover (31). A fixing ring (42) is fixedly installed on the inner side wall of the support frame (41). A screw (43) is installed through the top of the support frame (41). A movable plate (44) is threadedly connected to the outer arc surface of the screw (43). Four sets of rotating seats (47) are fixedly installed on the outer arc surface of the movable plate (44). A set of connecting rods (48) is rotatably installed on the inner side of each of the four sets of rotating seats (47). The middle part of each of the four sets of connecting rods (48) is rotatably connected to the outer arc surface of the fixing ring (42). A set of clamping blocks (49) is fixedly installed at one end of each of the four sets of connecting rods (48). A set of V-shaped clamping grooves (50) is opened on the inner side of each of the four sets of clamping blocks (49).

2. The air content meter for concrete mix design according to claim 1, characterized in that: A limiting rod (45) is fixedly installed on the inner bottom of the support frame (41). One end of the limiting rod (45) extends through to the bottom of the movable plate (44), and a limiting plate (46) is fixedly installed on one end of the limiting rod (45).

3. The air content measuring device for concrete mix design according to claim 1, characterized in that: An air chamber (32) is fixedly installed on the top of the bowl cover (31). A water injection valve (33) is connected to the side arc surface of the bowl cover (31). An exhaust valve (34) is connected through the middle of the bowl cover (31). One end of the exhaust valve (34) extends to the outside of the air chamber (32).

4. The air content measuring instrument for concrete mix design according to claim 3, characterized in that: The top of the air chamber (32) is connected to an air pump (35), a fine-tuning valve (36), and a pressure gauge (38), and a valve stem (37) is movably installed through the top of the air chamber (32).

5. The air content measuring instrument for concrete mix design according to claim 4, characterized in that: The outer arc surface of the valve stem (37) is movably and sealingly connected to the top of the air chamber (32), and the bottom end of the valve stem (37) extends into the interior of the bowl cover (31).

6. The air content measuring instrument for concrete mix design according to claim 1, characterized in that: The bottom of the measuring bowl (11) is fixedly equipped with several sets of support rods (12), and the bottom of several support rods (12) is jointly equipped with a set of bases (13).

7. The air content measuring instrument for concrete mix design according to claim 1, characterized in that: The stirring assembly (2) includes a drive motor (21) fixedly bolted to the top of the base (13). The output shaft of the drive motor (21) is keyed to a rotating rod (22). One end of the rotating rod (22) passes through a sealed bearing into the interior of the measuring bowl (11), and several sets of stirring rods (23) are fixedly installed on the outer arc surface of the rotating rod (22).

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